java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:18:09,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:18:09,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:18:09,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:18:09,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:18:09,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:18:09,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:18:09,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:18:09,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:18:09,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:18:09,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:18:09,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:18:09,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:18:09,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:18:09,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:18:09,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:18:09,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:18:09,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:18:09,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:18:09,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:18:09,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:18:09,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:18:09,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:18:09,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:18:09,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:18:09,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:18:09,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:18:09,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:18:09,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:18:09,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:18:09,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:18:09,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:18:09,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:18:09,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:18:09,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:18:09,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:18:09,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:18:09,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:18:09,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:18:09,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:18:09,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:18:09,318 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:18:09,332 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:18:09,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:18:09,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:18:09,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:18:09,335 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:18:09,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:18:09,335 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:18:09,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:18:09,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:18:09,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:18:09,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:18:09,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:18:09,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:18:09,336 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:18:09,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:18:09,337 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:18:09,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:18:09,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:18:09,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:18:09,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:18:09,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:18:09,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:18:09,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:18:09,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:18:09,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:18:09,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:18:09,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:18:09,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:18:09,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:18:09,611 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:18:09,628 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:18:09,634 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:18:09,636 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:18:09,637 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:18:09,638 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2.c [2019-10-13 19:18:09,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0659e7fd9/e6025ac231ee4b8da7492361b121d5c7/FLAGd3ae93441 [2019-10-13 19:18:10,213 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:18:10,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2.c [2019-10-13 19:18:10,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0659e7fd9/e6025ac231ee4b8da7492361b121d5c7/FLAGd3ae93441 [2019-10-13 19:18:10,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0659e7fd9/e6025ac231ee4b8da7492361b121d5c7 [2019-10-13 19:18:10,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:18:10,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:18:10,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:18:10,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:18:10,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:18:10,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:10" (1/1) ... [2019-10-13 19:18:10,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d4d713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10, skipping insertion in model container [2019-10-13 19:18:10,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:10" (1/1) ... [2019-10-13 19:18:10,583 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:18:10,603 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:18:10,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:18:10,777 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:18:10,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:18:10,816 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:18:10,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10 WrapperNode [2019-10-13 19:18:10,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:18:10,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:18:10,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:18:10,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:18:10,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10" (1/1) ... [2019-10-13 19:18:10,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10" (1/1) ... [2019-10-13 19:18:10,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10" (1/1) ... [2019-10-13 19:18:10,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10" (1/1) ... [2019-10-13 19:18:10,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10" (1/1) ... [2019-10-13 19:18:10,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10" (1/1) ... [2019-10-13 19:18:10,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10" (1/1) ... [2019-10-13 19:18:10,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:18:10,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:18:10,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:18:10,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:18:10,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:18:10,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:18:10,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:18:10,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:18:10,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:18:10,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:18:10,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:18:10,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:18:10,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:18:10,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:18:10,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:18:10,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:18:11,174 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:18:11,175 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 19:18:11,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:11 BoogieIcfgContainer [2019-10-13 19:18:11,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:18:11,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:18:11,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:18:11,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:18:11,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:18:10" (1/3) ... [2019-10-13 19:18:11,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aeeb181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:11, skipping insertion in model container [2019-10-13 19:18:11,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:10" (2/3) ... [2019-10-13 19:18:11,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aeeb181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:11, skipping insertion in model container [2019-10-13 19:18:11,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:11" (3/3) ... [2019-10-13 19:18:11,184 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd2.c [2019-10-13 19:18:11,192 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:18:11,199 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:18:11,210 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:18:11,233 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:18:11,233 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:18:11,233 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:18:11,234 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:18:11,234 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:18:11,234 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:18:11,234 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:18:11,234 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:18:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-13 19:18:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 19:18:11,258 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:11,259 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:11,261 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:11,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash -558324168, now seen corresponding path program 1 times [2019-10-13 19:18:11,274 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:11,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132106157] [2019-10-13 19:18:11,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:11,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:11,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:18:11,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132106157] [2019-10-13 19:18:11,383 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:18:11,383 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 19:18:11,383 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479374332] [2019-10-13 19:18:11,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:18:11,387 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:11,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:18:11,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:18:11,404 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-10-13 19:18:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:11,431 INFO L93 Difference]: Finished difference Result 49 states and 77 transitions. [2019-10-13 19:18:11,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:18:11,433 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-13 19:18:11,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:11,442 INFO L225 Difference]: With dead ends: 49 [2019-10-13 19:18:11,443 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 19:18:11,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:18:11,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 19:18:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 19:18:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 19:18:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-10-13 19:18:11,492 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2019-10-13 19:18:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:11,492 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-10-13 19:18:11,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:18:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-10-13 19:18:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 19:18:11,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:11,494 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:11,494 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1008536757, now seen corresponding path program 1 times [2019-10-13 19:18:11,495 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:11,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409884460] [2019-10-13 19:18:11,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:11,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:11,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:11,507 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:11,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383437656] [2019-10-13 19:18:11,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:11,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:18:11,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:18:11,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409884460] [2019-10-13 19:18:11,672 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:11,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383437656] [2019-10-13 19:18:11,672 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:18:11,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:18:11,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151310421] [2019-10-13 19:18:11,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:18:11,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:11,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:18:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:18:11,676 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 3 states. [2019-10-13 19:18:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:11,747 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-10-13 19:18:11,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:18:11,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-13 19:18:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:11,750 INFO L225 Difference]: With dead ends: 39 [2019-10-13 19:18:11,750 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 19:18:11,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:18:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 19:18:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2019-10-13 19:18:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 19:18:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-10-13 19:18:11,763 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 11 [2019-10-13 19:18:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:11,763 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-10-13 19:18:11,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:18:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-10-13 19:18:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 19:18:11,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:11,765 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:11,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:11,969 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:11,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:11,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1182801044, now seen corresponding path program 1 times [2019-10-13 19:18:11,971 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:11,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004733150] [2019-10-13 19:18:11,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:11,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:11,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:11,984 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:11,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407536059] [2019-10-13 19:18:11,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:12,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 19:18:12,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:18:12,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004733150] [2019-10-13 19:18:12,098 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:12,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407536059] [2019-10-13 19:18:12,099 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:18:12,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:18:12,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903295470] [2019-10-13 19:18:12,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:18:12,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:12,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:18:12,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:18:12,102 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 5 states. [2019-10-13 19:18:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:12,202 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2019-10-13 19:18:12,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:18:12,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-13 19:18:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:12,204 INFO L225 Difference]: With dead ends: 37 [2019-10-13 19:18:12,204 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 19:18:12,205 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:18:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 19:18:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-10-13 19:18:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 19:18:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-13 19:18:12,215 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2019-10-13 19:18:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:12,216 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-13 19:18:12,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:18:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-13 19:18:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 19:18:12,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:12,217 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:12,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:12,429 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:12,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2031293851, now seen corresponding path program 1 times [2019-10-13 19:18:12,430 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:12,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86788538] [2019-10-13 19:18:12,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:12,432 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:12,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:12,444 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:12,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928095324] [2019-10-13 19:18:12,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:12,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:18:12,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:18:12,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86788538] [2019-10-13 19:18:12,539 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:12,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928095324] [2019-10-13 19:18:12,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:18:12,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:18:12,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569677161] [2019-10-13 19:18:12,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:18:12,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:12,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:18:12,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:18:12,542 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 5 states. [2019-10-13 19:18:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:12,609 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-10-13 19:18:12,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:18:12,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-13 19:18:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:12,613 INFO L225 Difference]: With dead ends: 45 [2019-10-13 19:18:12,613 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 19:18:12,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:18:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 19:18:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-10-13 19:18:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 19:18:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-13 19:18:12,627 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 17 [2019-10-13 19:18:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:12,627 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-13 19:18:12,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:18:12,628 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-13 19:18:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 19:18:12,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:12,629 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:12,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:12,839 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:12,841 INFO L82 PathProgramCache]: Analyzing trace with hash -71864628, now seen corresponding path program 1 times [2019-10-13 19:18:12,841 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:12,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327697693] [2019-10-13 19:18:12,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:12,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:12,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:12,850 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:12,850 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859525781] [2019-10-13 19:18:12,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:12,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:18:12,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:18:12,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327697693] [2019-10-13 19:18:12,925 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:12,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859525781] [2019-10-13 19:18:12,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:18:12,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:18:12,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065314309] [2019-10-13 19:18:12,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:18:12,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:12,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:18:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:18:12,928 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 5 states. [2019-10-13 19:18:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:13,041 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-10-13 19:18:13,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:18:13,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-13 19:18:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:13,045 INFO L225 Difference]: With dead ends: 49 [2019-10-13 19:18:13,046 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:18:13,046 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:18:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:18:13,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-13 19:18:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 19:18:13,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-10-13 19:18:13,068 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 22 [2019-10-13 19:18:13,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:13,068 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-10-13 19:18:13,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:18:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-10-13 19:18:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 19:18:13,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:13,073 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:13,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:13,275 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash 954332139, now seen corresponding path program 1 times [2019-10-13 19:18:13,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:13,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051415504] [2019-10-13 19:18:13,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:13,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:13,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:13,285 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:13,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751898259] [2019-10-13 19:18:13,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:13,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:18:13,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 19:18:13,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051415504] [2019-10-13 19:18:13,363 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:13,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751898259] [2019-10-13 19:18:13,363 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:13,363 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-13 19:18:13,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563220687] [2019-10-13 19:18:13,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:18:13,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:13,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:18:13,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:18:13,365 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 6 states. [2019-10-13 19:18:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:13,476 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2019-10-13 19:18:13,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:18:13,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-10-13 19:18:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:13,478 INFO L225 Difference]: With dead ends: 74 [2019-10-13 19:18:13,478 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 19:18:13,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:18:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 19:18:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2019-10-13 19:18:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-13 19:18:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2019-10-13 19:18:13,494 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 34 [2019-10-13 19:18:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:13,494 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2019-10-13 19:18:13,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:18:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2019-10-13 19:18:13,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 19:18:13,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:13,496 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:13,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:13,701 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:13,701 INFO L82 PathProgramCache]: Analyzing trace with hash 286726549, now seen corresponding path program 1 times [2019-10-13 19:18:13,702 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:13,702 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043426249] [2019-10-13 19:18:13,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:13,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:13,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:13,712 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:13,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486724182] [2019-10-13 19:18:13,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:13,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:18:13,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 19:18:13,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043426249] [2019-10-13 19:18:13,805 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:13,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486724182] [2019-10-13 19:18:13,805 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:13,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-13 19:18:13,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548150298] [2019-10-13 19:18:13,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:18:13,806 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:13,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:18:13,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:18:13,807 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand 5 states. [2019-10-13 19:18:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:13,918 INFO L93 Difference]: Finished difference Result 107 states and 151 transitions. [2019-10-13 19:18:13,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:18:13,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-13 19:18:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:13,926 INFO L225 Difference]: With dead ends: 107 [2019-10-13 19:18:13,926 INFO L226 Difference]: Without dead ends: 99 [2019-10-13 19:18:13,927 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:18:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-13 19:18:13,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2019-10-13 19:18:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-13 19:18:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 124 transitions. [2019-10-13 19:18:13,954 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 124 transitions. Word has length 36 [2019-10-13 19:18:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:13,955 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 124 transitions. [2019-10-13 19:18:13,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:18:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 124 transitions. [2019-10-13 19:18:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:18:13,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:13,959 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:14,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:14,160 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:14,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1803964113, now seen corresponding path program 1 times [2019-10-13 19:18:14,161 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:14,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292982352] [2019-10-13 19:18:14,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:14,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:14,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:14,168 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:14,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308178136] [2019-10-13 19:18:14,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:14,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 19:18:14,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 19:18:14,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292982352] [2019-10-13 19:18:14,274 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:14,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308178136] [2019-10-13 19:18:14,275 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:14,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-13 19:18:14,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633937056] [2019-10-13 19:18:14,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:18:14,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:14,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:18:14,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:18:14,278 INFO L87 Difference]: Start difference. First operand 88 states and 124 transitions. Second operand 6 states. [2019-10-13 19:18:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:14,407 INFO L93 Difference]: Finished difference Result 133 states and 192 transitions. [2019-10-13 19:18:14,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:18:14,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2019-10-13 19:18:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:14,410 INFO L225 Difference]: With dead ends: 133 [2019-10-13 19:18:14,410 INFO L226 Difference]: Without dead ends: 130 [2019-10-13 19:18:14,411 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:18:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-13 19:18:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2019-10-13 19:18:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-13 19:18:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 185 transitions. [2019-10-13 19:18:14,439 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 185 transitions. Word has length 42 [2019-10-13 19:18:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:14,439 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 185 transitions. [2019-10-13 19:18:14,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:18:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 185 transitions. [2019-10-13 19:18:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 19:18:14,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:14,442 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:14,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:14,645 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1108781502, now seen corresponding path program 2 times [2019-10-13 19:18:14,646 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:14,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844119622] [2019-10-13 19:18:14,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:14,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:14,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:14,658 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:14,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995443253] [2019-10-13 19:18:14,662 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:14,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:18:14,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:14,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 19:18:14,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 19:18:14,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844119622] [2019-10-13 19:18:14,808 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:14,809 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995443253] [2019-10-13 19:18:14,809 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:14,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-13 19:18:14,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265997124] [2019-10-13 19:18:14,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:18:14,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:14,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:18:14,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:18:14,811 INFO L87 Difference]: Start difference. First operand 127 states and 185 transitions. Second operand 7 states. [2019-10-13 19:18:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:14,971 INFO L93 Difference]: Finished difference Result 139 states and 195 transitions. [2019-10-13 19:18:14,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:18:14,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-13 19:18:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:14,974 INFO L225 Difference]: With dead ends: 139 [2019-10-13 19:18:14,974 INFO L226 Difference]: Without dead ends: 137 [2019-10-13 19:18:14,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:18:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-10-13 19:18:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-10-13 19:18:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-13 19:18:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 191 transitions. [2019-10-13 19:18:14,998 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 191 transitions. Word has length 47 [2019-10-13 19:18:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:14,998 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 191 transitions. [2019-10-13 19:18:14,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:18:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 191 transitions. [2019-10-13 19:18:15,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 19:18:15,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:15,001 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:15,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:15,211 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:15,212 INFO L82 PathProgramCache]: Analyzing trace with hash 183700266, now seen corresponding path program 2 times [2019-10-13 19:18:15,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:15,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234679389] [2019-10-13 19:18:15,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:15,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:15,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:15,220 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:15,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921083375] [2019-10-13 19:18:15,221 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:15,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:18:15,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:15,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 19:18:15,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 19:18:15,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234679389] [2019-10-13 19:18:15,354 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:15,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921083375] [2019-10-13 19:18:15,354 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:15,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-13 19:18:15,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63291961] [2019-10-13 19:18:15,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:18:15,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:15,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:18:15,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:18:15,358 INFO L87 Difference]: Start difference. First operand 135 states and 191 transitions. Second operand 7 states. [2019-10-13 19:18:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:15,600 INFO L93 Difference]: Finished difference Result 198 states and 298 transitions. [2019-10-13 19:18:15,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:18:15,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-10-13 19:18:15,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:15,604 INFO L225 Difference]: With dead ends: 198 [2019-10-13 19:18:15,604 INFO L226 Difference]: Without dead ends: 196 [2019-10-13 19:18:15,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:18:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-10-13 19:18:15,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 169. [2019-10-13 19:18:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-10-13 19:18:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 249 transitions. [2019-10-13 19:18:15,632 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 249 transitions. Word has length 56 [2019-10-13 19:18:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:15,633 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 249 transitions. [2019-10-13 19:18:15,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:18:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 249 transitions. [2019-10-13 19:18:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 19:18:15,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:15,635 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:15,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:15,839 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:15,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1556128492, now seen corresponding path program 1 times [2019-10-13 19:18:15,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:15,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972580444] [2019-10-13 19:18:15,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:15,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:15,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:15,846 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:15,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477417071] [2019-10-13 19:18:15,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:15,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-13 19:18:15,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 19:18:16,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972580444] [2019-10-13 19:18:16,016 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:16,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477417071] [2019-10-13 19:18:16,016 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:16,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-13 19:18:16,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015068934] [2019-10-13 19:18:16,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:18:16,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:16,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:18:16,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:18:16,018 INFO L87 Difference]: Start difference. First operand 169 states and 249 transitions. Second operand 9 states. [2019-10-13 19:18:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:16,349 INFO L93 Difference]: Finished difference Result 205 states and 300 transitions. [2019-10-13 19:18:16,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:18:16,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2019-10-13 19:18:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:16,352 INFO L225 Difference]: With dead ends: 205 [2019-10-13 19:18:16,352 INFO L226 Difference]: Without dead ends: 202 [2019-10-13 19:18:16,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:18:16,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-10-13 19:18:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-10-13 19:18:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-10-13 19:18:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 294 transitions. [2019-10-13 19:18:16,378 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 294 transitions. Word has length 58 [2019-10-13 19:18:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:16,378 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 294 transitions. [2019-10-13 19:18:16,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:18:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 294 transitions. [2019-10-13 19:18:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 19:18:16,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:16,381 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:16,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:16,585 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash 674447781, now seen corresponding path program 3 times [2019-10-13 19:18:16,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:16,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681415712] [2019-10-13 19:18:16,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:16,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:16,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:16,592 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:16,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556906993] [2019-10-13 19:18:16,593 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:16,633 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:18:16,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:16,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:18:16,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-13 19:18:16,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681415712] [2019-10-13 19:18:16,682 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:16,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556906993] [2019-10-13 19:18:16,682 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:18:16,682 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:18:16,682 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55765431] [2019-10-13 19:18:16,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:18:16,683 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:16,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:18:16,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:18:16,686 INFO L87 Difference]: Start difference. First operand 200 states and 294 transitions. Second operand 5 states. [2019-10-13 19:18:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:16,806 INFO L93 Difference]: Finished difference Result 252 states and 366 transitions. [2019-10-13 19:18:16,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:18:16,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2019-10-13 19:18:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:16,814 INFO L225 Difference]: With dead ends: 252 [2019-10-13 19:18:16,814 INFO L226 Difference]: Without dead ends: 177 [2019-10-13 19:18:16,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:18:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-13 19:18:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 141. [2019-10-13 19:18:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-13 19:18:16,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 195 transitions. [2019-10-13 19:18:16,850 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 195 transitions. Word has length 67 [2019-10-13 19:18:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:16,851 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 195 transitions. [2019-10-13 19:18:16,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:18:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 195 transitions. [2019-10-13 19:18:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 19:18:16,854 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:16,854 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:17,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:17,059 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:17,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1094555945, now seen corresponding path program 3 times [2019-10-13 19:18:17,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:17,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665451373] [2019-10-13 19:18:17,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:17,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:17,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:17,088 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:17,088 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309385042] [2019-10-13 19:18:17,088 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:17,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 19:18:17,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:17,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 19:18:17,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-10-13 19:18:17,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665451373] [2019-10-13 19:18:17,241 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:17,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309385042] [2019-10-13 19:18:17,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:17,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-13 19:18:17,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135799706] [2019-10-13 19:18:17,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:18:17,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:17,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:18:17,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:18:17,245 INFO L87 Difference]: Start difference. First operand 141 states and 195 transitions. Second operand 8 states. [2019-10-13 19:18:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:17,432 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2019-10-13 19:18:17,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:18:17,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2019-10-13 19:18:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:17,435 INFO L225 Difference]: With dead ends: 151 [2019-10-13 19:18:17,436 INFO L226 Difference]: Without dead ends: 149 [2019-10-13 19:18:17,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:18:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-10-13 19:18:17,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2019-10-13 19:18:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-13 19:18:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 195 transitions. [2019-10-13 19:18:17,455 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 195 transitions. Word has length 78 [2019-10-13 19:18:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:17,457 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 195 transitions. [2019-10-13 19:18:17,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:18:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 195 transitions. [2019-10-13 19:18:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 19:18:17,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:17,460 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:17,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:17,666 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:17,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1897817939, now seen corresponding path program 2 times [2019-10-13 19:18:17,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:17,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111395473] [2019-10-13 19:18:17,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:17,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:17,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:17,673 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:17,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585726534] [2019-10-13 19:18:17,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:17,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:18:17,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:17,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-13 19:18:17,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-10-13 19:18:17,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111395473] [2019-10-13 19:18:17,941 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:17,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585726534] [2019-10-13 19:18:17,942 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:17,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 19:18:17,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298106317] [2019-10-13 19:18:17,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:18:17,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:17,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:18:17,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:18:17,944 INFO L87 Difference]: Start difference. First operand 143 states and 195 transitions. Second operand 10 states. [2019-10-13 19:18:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:18,467 INFO L93 Difference]: Finished difference Result 185 states and 256 transitions. [2019-10-13 19:18:18,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:18:18,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2019-10-13 19:18:18,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:18,470 INFO L225 Difference]: With dead ends: 185 [2019-10-13 19:18:18,470 INFO L226 Difference]: Without dead ends: 182 [2019-10-13 19:18:18,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:18:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-10-13 19:18:18,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2019-10-13 19:18:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-10-13 19:18:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 209 transitions. [2019-10-13 19:18:18,495 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 209 transitions. Word has length 80 [2019-10-13 19:18:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:18,496 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 209 transitions. [2019-10-13 19:18:18,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:18:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 209 transitions. [2019-10-13 19:18:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-13 19:18:18,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:18,497 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:18,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:18,710 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:18,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:18,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1613054346, now seen corresponding path program 3 times [2019-10-13 19:18:18,711 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:18,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991030658] [2019-10-13 19:18:18,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:18,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:18,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:18,718 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:18,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38253091] [2019-10-13 19:18:18,719 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:18,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:18:18,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:18,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:18:18,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-10-13 19:18:18,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991030658] [2019-10-13 19:18:18,823 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:18,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38253091] [2019-10-13 19:18:18,823 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:18,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-13 19:18:18,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466767010] [2019-10-13 19:18:18,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:18:18,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:18:18,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:18:18,825 INFO L87 Difference]: Start difference. First operand 153 states and 209 transitions. Second operand 7 states. [2019-10-13 19:18:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:19,094 INFO L93 Difference]: Finished difference Result 185 states and 257 transitions. [2019-10-13 19:18:19,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:18:19,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2019-10-13 19:18:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:19,096 INFO L225 Difference]: With dead ends: 185 [2019-10-13 19:18:19,096 INFO L226 Difference]: Without dead ends: 177 [2019-10-13 19:18:19,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:18:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-13 19:18:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 156. [2019-10-13 19:18:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-13 19:18:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 212 transitions. [2019-10-13 19:18:19,112 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 212 transitions. Word has length 83 [2019-10-13 19:18:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:19,113 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 212 transitions. [2019-10-13 19:18:19,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:18:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 212 transitions. [2019-10-13 19:18:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 19:18:19,115 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:19,115 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:19,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:19,319 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1805300380, now seen corresponding path program 1 times [2019-10-13 19:18:19,320 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:19,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406329260] [2019-10-13 19:18:19,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:19,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:19,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:19,327 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:19,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698376410] [2019-10-13 19:18:19,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:19,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 19:18:19,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2019-10-13 19:18:19,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406329260] [2019-10-13 19:18:19,510 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:19,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698376410] [2019-10-13 19:18:19,510 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:19,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-13 19:18:19,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933322668] [2019-10-13 19:18:19,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:18:19,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:19,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:18:19,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:18:19,513 INFO L87 Difference]: Start difference. First operand 156 states and 212 transitions. Second operand 8 states. [2019-10-13 19:18:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:19,691 INFO L93 Difference]: Finished difference Result 219 states and 305 transitions. [2019-10-13 19:18:19,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:18:19,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2019-10-13 19:18:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:19,693 INFO L225 Difference]: With dead ends: 219 [2019-10-13 19:18:19,694 INFO L226 Difference]: Without dead ends: 216 [2019-10-13 19:18:19,694 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:18:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-13 19:18:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2019-10-13 19:18:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-10-13 19:18:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 298 transitions. [2019-10-13 19:18:19,715 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 298 transitions. Word has length 89 [2019-10-13 19:18:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:19,716 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 298 transitions. [2019-10-13 19:18:19,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:18:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 298 transitions. [2019-10-13 19:18:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 19:18:19,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:19,718 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:19,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:19,921 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:19,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2024795347, now seen corresponding path program 2 times [2019-10-13 19:18:19,923 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:19,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989812529] [2019-10-13 19:18:19,923 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:19,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:19,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:19,930 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:19,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577065641] [2019-10-13 19:18:19,930 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:19,983 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:18:19,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:19,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2019-10-13 19:18:19,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-10-13 19:18:20,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989812529] [2019-10-13 19:18:20,148 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:20,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577065641] [2019-10-13 19:18:20,149 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:20,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 19:18:20,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400557775] [2019-10-13 19:18:20,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:18:20,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:20,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:18:20,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:18:20,150 INFO L87 Difference]: Start difference. First operand 213 states and 298 transitions. Second operand 10 states. [2019-10-13 19:18:20,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:20,611 INFO L93 Difference]: Finished difference Result 253 states and 349 transitions. [2019-10-13 19:18:20,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:18:20,612 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 94 [2019-10-13 19:18:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:20,614 INFO L225 Difference]: With dead ends: 253 [2019-10-13 19:18:20,614 INFO L226 Difference]: Without dead ends: 251 [2019-10-13 19:18:20,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:18:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-10-13 19:18:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 195. [2019-10-13 19:18:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-10-13 19:18:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 262 transitions. [2019-10-13 19:18:20,636 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 262 transitions. Word has length 94 [2019-10-13 19:18:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:20,636 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 262 transitions. [2019-10-13 19:18:20,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:18:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 262 transitions. [2019-10-13 19:18:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 19:18:20,638 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:20,638 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:20,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:20,842 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:20,843 INFO L82 PathProgramCache]: Analyzing trace with hash 804169810, now seen corresponding path program 4 times [2019-10-13 19:18:20,843 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:20,843 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000608430] [2019-10-13 19:18:20,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:20,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:20,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:20,850 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:20,850 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406110746] [2019-10-13 19:18:20,850 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:20,902 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:18:20,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:20,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-13 19:18:20,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:21,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 31 proven. 156 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-10-13 19:18:21,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000608430] [2019-10-13 19:18:21,139 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:21,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406110746] [2019-10-13 19:18:21,139 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:21,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-13 19:18:21,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385048362] [2019-10-13 19:18:21,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:18:21,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:21,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:18:21,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:18:21,141 INFO L87 Difference]: Start difference. First operand 195 states and 262 transitions. Second operand 14 states. [2019-10-13 19:18:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:21,794 INFO L93 Difference]: Finished difference Result 267 states and 383 transitions. [2019-10-13 19:18:21,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:18:21,795 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2019-10-13 19:18:21,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:21,799 INFO L225 Difference]: With dead ends: 267 [2019-10-13 19:18:21,799 INFO L226 Difference]: Without dead ends: 264 [2019-10-13 19:18:21,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:18:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-10-13 19:18:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2019-10-13 19:18:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-10-13 19:18:21,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 375 transitions. [2019-10-13 19:18:21,836 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 375 transitions. Word has length 102 [2019-10-13 19:18:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:21,837 INFO L462 AbstractCegarLoop]: Abstraction has 260 states and 375 transitions. [2019-10-13 19:18:21,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:18:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 375 transitions. [2019-10-13 19:18:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 19:18:21,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:21,838 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:22,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:22,047 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1563777377, now seen corresponding path program 3 times [2019-10-13 19:18:22,048 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:22,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713388162] [2019-10-13 19:18:22,048 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:22,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:22,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:22,054 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:22,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49239015] [2019-10-13 19:18:22,055 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:22,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 19:18:22,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:22,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 19:18:22,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 81 proven. 32 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2019-10-13 19:18:22,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713388162] [2019-10-13 19:18:22,171 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:22,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49239015] [2019-10-13 19:18:22,171 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:22,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 19:18:22,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848201270] [2019-10-13 19:18:22,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:18:22,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:22,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:18:22,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:18:22,172 INFO L87 Difference]: Start difference. First operand 260 states and 375 transitions. Second operand 10 states. [2019-10-13 19:18:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:22,489 INFO L93 Difference]: Finished difference Result 273 states and 386 transitions. [2019-10-13 19:18:22,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:18:22,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2019-10-13 19:18:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:22,494 INFO L225 Difference]: With dead ends: 273 [2019-10-13 19:18:22,494 INFO L226 Difference]: Without dead ends: 271 [2019-10-13 19:18:22,495 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:18:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-10-13 19:18:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 268. [2019-10-13 19:18:22,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-10-13 19:18:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 381 transitions. [2019-10-13 19:18:22,532 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 381 transitions. Word has length 103 [2019-10-13 19:18:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:22,533 INFO L462 AbstractCegarLoop]: Abstraction has 268 states and 381 transitions. [2019-10-13 19:18:22,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:18:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 381 transitions. [2019-10-13 19:18:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 19:18:22,534 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:22,535 INFO L380 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:22,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:22,747 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:22,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:22,747 INFO L82 PathProgramCache]: Analyzing trace with hash 822393669, now seen corresponding path program 4 times [2019-10-13 19:18:22,748 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:22,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819018892] [2019-10-13 19:18:22,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:22,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:22,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:22,761 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:22,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096236178] [2019-10-13 19:18:22,761 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:22,831 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:18:22,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:22,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-13 19:18:22,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 70 proven. 105 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-10-13 19:18:22,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819018892] [2019-10-13 19:18:22,910 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:22,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096236178] [2019-10-13 19:18:22,910 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:22,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 19:18:22,911 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193355215] [2019-10-13 19:18:22,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:18:22,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:22,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:18:22,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:18:22,913 INFO L87 Difference]: Start difference. First operand 268 states and 381 transitions. Second operand 10 states. [2019-10-13 19:18:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:23,214 INFO L93 Difference]: Finished difference Result 289 states and 398 transitions. [2019-10-13 19:18:23,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:18:23,214 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 111 [2019-10-13 19:18:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:23,216 INFO L225 Difference]: With dead ends: 289 [2019-10-13 19:18:23,216 INFO L226 Difference]: Without dead ends: 285 [2019-10-13 19:18:23,218 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:18:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-10-13 19:18:23,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 193. [2019-10-13 19:18:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-10-13 19:18:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 250 transitions. [2019-10-13 19:18:23,247 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 250 transitions. Word has length 111 [2019-10-13 19:18:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:23,248 INFO L462 AbstractCegarLoop]: Abstraction has 193 states and 250 transitions. [2019-10-13 19:18:23,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:18:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 250 transitions. [2019-10-13 19:18:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 19:18:23,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:23,251 INFO L380 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:23,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:23,454 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1081511953, now seen corresponding path program 5 times [2019-10-13 19:18:23,454 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:23,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580718601] [2019-10-13 19:18:23,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:23,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:23,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:23,470 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:23,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314187916] [2019-10-13 19:18:23,471 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:23,617 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 19:18:23,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:23,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-13 19:18:23,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 45 proven. 114 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 19:18:24,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580718601] [2019-10-13 19:18:24,003 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:24,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314187916] [2019-10-13 19:18:24,004 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:24,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-13 19:18:24,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532268670] [2019-10-13 19:18:24,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:18:24,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:18:24,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:18:24,010 INFO L87 Difference]: Start difference. First operand 193 states and 250 transitions. Second operand 15 states. [2019-10-13 19:18:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:25,085 INFO L93 Difference]: Finished difference Result 257 states and 340 transitions. [2019-10-13 19:18:25,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:18:25,089 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 124 [2019-10-13 19:18:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:25,091 INFO L225 Difference]: With dead ends: 257 [2019-10-13 19:18:25,091 INFO L226 Difference]: Without dead ends: 254 [2019-10-13 19:18:25,092 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:18:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-10-13 19:18:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 207. [2019-10-13 19:18:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-10-13 19:18:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 267 transitions. [2019-10-13 19:18:25,132 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 267 transitions. Word has length 124 [2019-10-13 19:18:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:25,132 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 267 transitions. [2019-10-13 19:18:25,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:18:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 267 transitions. [2019-10-13 19:18:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 19:18:25,134 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:25,134 INFO L380 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:25,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:25,341 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1556105536, now seen corresponding path program 5 times [2019-10-13 19:18:25,341 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:25,342 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749239292] [2019-10-13 19:18:25,342 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:25,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:25,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:25,349 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:25,349 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555713440] [2019-10-13 19:18:25,349 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:25,432 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-13 19:18:25,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:25,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 19:18:25,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-10-13 19:18:25,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749239292] [2019-10-13 19:18:25,514 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:25,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555713440] [2019-10-13 19:18:25,514 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:25,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-13 19:18:25,515 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262843074] [2019-10-13 19:18:25,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:18:25,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:25,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:18:25,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:18:25,516 INFO L87 Difference]: Start difference. First operand 207 states and 267 transitions. Second operand 8 states. [2019-10-13 19:18:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:25,805 INFO L93 Difference]: Finished difference Result 220 states and 278 transitions. [2019-10-13 19:18:25,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:18:25,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2019-10-13 19:18:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:25,808 INFO L225 Difference]: With dead ends: 220 [2019-10-13 19:18:25,808 INFO L226 Difference]: Without dead ends: 218 [2019-10-13 19:18:25,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:18:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-10-13 19:18:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2019-10-13 19:18:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-10-13 19:18:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 273 transitions. [2019-10-13 19:18:25,835 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 273 transitions. Word has length 125 [2019-10-13 19:18:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:25,836 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 273 transitions. [2019-10-13 19:18:25,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:18:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 273 transitions. [2019-10-13 19:18:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 19:18:25,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:25,838 INFO L380 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:26,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:26,042 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:26,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:26,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1040748176, now seen corresponding path program 6 times [2019-10-13 19:18:26,043 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:26,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072306867] [2019-10-13 19:18:26,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:26,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:26,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:26,048 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:26,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962326609] [2019-10-13 19:18:26,048 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:26,100 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 19:18:26,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:26,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-13 19:18:26,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:26,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 107 proven. 32 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2019-10-13 19:18:26,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072306867] [2019-10-13 19:18:26,269 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:26,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962326609] [2019-10-13 19:18:26,269 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:26,269 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 19:18:26,269 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599744177] [2019-10-13 19:18:26,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:18:26,270 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:18:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:18:26,270 INFO L87 Difference]: Start difference. First operand 215 states and 273 transitions. Second operand 10 states. [2019-10-13 19:18:26,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:26,596 INFO L93 Difference]: Finished difference Result 272 states and 355 transitions. [2019-10-13 19:18:26,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:18:26,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 146 [2019-10-13 19:18:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:26,599 INFO L225 Difference]: With dead ends: 272 [2019-10-13 19:18:26,599 INFO L226 Difference]: Without dead ends: 269 [2019-10-13 19:18:26,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:18:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-10-13 19:18:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 208. [2019-10-13 19:18:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-10-13 19:18:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 260 transitions. [2019-10-13 19:18:26,627 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 260 transitions. Word has length 146 [2019-10-13 19:18:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:26,628 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 260 transitions. [2019-10-13 19:18:26,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:18:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 260 transitions. [2019-10-13 19:18:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 19:18:26,630 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:26,630 INFO L380 BasicCegarLoop]: trace histogram [25, 24, 24, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:26,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:26,834 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:26,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:26,834 INFO L82 PathProgramCache]: Analyzing trace with hash -218640321, now seen corresponding path program 6 times [2019-10-13 19:18:26,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:26,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139653767] [2019-10-13 19:18:26,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:26,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:26,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:26,840 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:26,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897664640] [2019-10-13 19:18:26,840 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:26,910 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 19:18:26,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:26,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 19:18:26,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 139 proven. 10 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2019-10-13 19:18:26,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139653767] [2019-10-13 19:18:26,958 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:26,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897664640] [2019-10-13 19:18:26,958 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:26,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-13 19:18:26,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358157850] [2019-10-13 19:18:26,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:18:26,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:26,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:18:26,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:18:26,959 INFO L87 Difference]: Start difference. First operand 208 states and 260 transitions. Second operand 7 states. [2019-10-13 19:18:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:27,072 INFO L93 Difference]: Finished difference Result 214 states and 265 transitions. [2019-10-13 19:18:27,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:18:27,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2019-10-13 19:18:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:27,074 INFO L225 Difference]: With dead ends: 214 [2019-10-13 19:18:27,074 INFO L226 Difference]: Without dead ends: 212 [2019-10-13 19:18:27,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:18:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-13 19:18:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2019-10-13 19:18:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-10-13 19:18:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 263 transitions. [2019-10-13 19:18:27,100 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 263 transitions. Word has length 147 [2019-10-13 19:18:27,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:27,101 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 263 transitions. [2019-10-13 19:18:27,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:18:27,101 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 263 transitions. [2019-10-13 19:18:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 19:18:27,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:27,103 INFO L380 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:27,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:27,306 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:27,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1300397831, now seen corresponding path program 7 times [2019-10-13 19:18:27,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:27,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949179190] [2019-10-13 19:18:27,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:27,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:27,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:27,312 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:27,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768272410] [2019-10-13 19:18:27,313 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:27,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-13 19:18:27,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2019-10-13 19:18:27,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949179190] [2019-10-13 19:18:27,839 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:27,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768272410] [2019-10-13 19:18:27,839 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:27,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-13 19:18:27,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623897116] [2019-10-13 19:18:27,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:18:27,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:27,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:18:27,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:18:27,841 INFO L87 Difference]: Start difference. First operand 212 states and 263 transitions. Second operand 14 states. [2019-10-13 19:18:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:28,740 INFO L93 Difference]: Finished difference Result 273 states and 351 transitions. [2019-10-13 19:18:28,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:18:28,741 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 149 [2019-10-13 19:18:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:28,743 INFO L225 Difference]: With dead ends: 273 [2019-10-13 19:18:28,743 INFO L226 Difference]: Without dead ends: 270 [2019-10-13 19:18:28,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:18:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-10-13 19:18:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 222. [2019-10-13 19:18:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-10-13 19:18:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 277 transitions. [2019-10-13 19:18:28,772 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 277 transitions. Word has length 149 [2019-10-13 19:18:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:28,772 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 277 transitions. [2019-10-13 19:18:28,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:18:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 277 transitions. [2019-10-13 19:18:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 19:18:28,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:28,775 INFO L380 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:28,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:28,979 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1997061882, now seen corresponding path program 8 times [2019-10-13 19:18:28,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:28,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034417554] [2019-10-13 19:18:28,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:28,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:28,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:28,985 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:28,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155816943] [2019-10-13 19:18:28,986 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:29,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:18:29,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:29,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-13 19:18:29,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 56 proven. 133 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2019-10-13 19:18:29,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034417554] [2019-10-13 19:18:29,432 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:29,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155816943] [2019-10-13 19:18:29,432 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:29,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-13 19:18:29,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390475662] [2019-10-13 19:18:29,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:18:29,433 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:29,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:18:29,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:18:29,434 INFO L87 Difference]: Start difference. First operand 222 states and 277 transitions. Second operand 15 states. [2019-10-13 19:18:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:30,573 INFO L93 Difference]: Finished difference Result 284 states and 366 transitions. [2019-10-13 19:18:30,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:18:30,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 171 [2019-10-13 19:18:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:30,576 INFO L225 Difference]: With dead ends: 284 [2019-10-13 19:18:30,577 INFO L226 Difference]: Without dead ends: 281 [2019-10-13 19:18:30,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:18:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-10-13 19:18:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 232. [2019-10-13 19:18:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-10-13 19:18:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 291 transitions. [2019-10-13 19:18:30,629 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 291 transitions. Word has length 171 [2019-10-13 19:18:30,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:30,629 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 291 transitions. [2019-10-13 19:18:30,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:18:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 291 transitions. [2019-10-13 19:18:30,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 19:18:30,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:30,631 INFO L380 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:30,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:30,836 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:30,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1873117848, now seen corresponding path program 9 times [2019-10-13 19:18:30,837 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:30,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607040126] [2019-10-13 19:18:30,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:30,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:30,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:30,852 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:30,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86317486] [2019-10-13 19:18:30,857 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:30,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 19:18:30,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:30,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 62 conjunts are in the unsatisfiable core [2019-10-13 19:18:30,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:31,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 127 proven. 99 refuted. 0 times theorem prover too weak. 1475 trivial. 0 not checked. [2019-10-13 19:18:31,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607040126] [2019-10-13 19:18:31,231 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:31,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86317486] [2019-10-13 19:18:31,232 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:31,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-13 19:18:31,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304449263] [2019-10-13 19:18:31,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:18:31,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:31,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:18:31,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:18:31,233 INFO L87 Difference]: Start difference. First operand 232 states and 291 transitions. Second operand 13 states. [2019-10-13 19:18:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:31,793 INFO L93 Difference]: Finished difference Result 347 states and 449 transitions. [2019-10-13 19:18:31,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:18:31,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 171 [2019-10-13 19:18:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:31,797 INFO L225 Difference]: With dead ends: 347 [2019-10-13 19:18:31,797 INFO L226 Difference]: Without dead ends: 344 [2019-10-13 19:18:31,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:18:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-10-13 19:18:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 341. [2019-10-13 19:18:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-10-13 19:18:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 442 transitions. [2019-10-13 19:18:31,853 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 442 transitions. Word has length 171 [2019-10-13 19:18:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:31,853 INFO L462 AbstractCegarLoop]: Abstraction has 341 states and 442 transitions. [2019-10-13 19:18:31,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:18:31,854 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 442 transitions. [2019-10-13 19:18:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-13 19:18:31,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:31,856 INFO L380 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:32,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:32,059 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1096608197, now seen corresponding path program 10 times [2019-10-13 19:18:32,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:32,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631869540] [2019-10-13 19:18:32,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:32,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:32,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:32,069 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:32,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105716851] [2019-10-13 19:18:32,069 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:32,176 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:18:32,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:32,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 79 conjunts are in the unsatisfiable core [2019-10-13 19:18:32,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:32,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 66 proven. 432 refuted. 0 times theorem prover too weak. 1725 trivial. 0 not checked. [2019-10-13 19:18:32,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631869540] [2019-10-13 19:18:32,566 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:32,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105716851] [2019-10-13 19:18:32,566 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:32,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-13 19:18:32,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096310360] [2019-10-13 19:18:32,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 19:18:32,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:32,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 19:18:32,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:18:32,568 INFO L87 Difference]: Start difference. First operand 341 states and 442 transitions. Second operand 18 states. [2019-10-13 19:18:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:33,685 INFO L93 Difference]: Finished difference Result 487 states and 656 transitions. [2019-10-13 19:18:33,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 19:18:33,686 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 193 [2019-10-13 19:18:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:33,688 INFO L225 Difference]: With dead ends: 487 [2019-10-13 19:18:33,689 INFO L226 Difference]: Without dead ends: 484 [2019-10-13 19:18:33,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2019-10-13 19:18:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2019-10-13 19:18:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 452. [2019-10-13 19:18:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2019-10-13 19:18:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 618 transitions. [2019-10-13 19:18:33,775 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 618 transitions. Word has length 193 [2019-10-13 19:18:33,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:33,776 INFO L462 AbstractCegarLoop]: Abstraction has 452 states and 618 transitions. [2019-10-13 19:18:33,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 19:18:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 618 transitions. [2019-10-13 19:18:33,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-13 19:18:33,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:33,779 INFO L380 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:33,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:33,983 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:33,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:33,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1469442372, now seen corresponding path program 11 times [2019-10-13 19:18:33,984 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:33,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279654681] [2019-10-13 19:18:33,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:33,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:33,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:33,990 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:33,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886451023] [2019-10-13 19:18:33,990 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:34,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-13 19:18:34,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:34,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-13 19:18:34,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2815 backedges. 97 proven. 402 refuted. 0 times theorem prover too weak. 2316 trivial. 0 not checked. [2019-10-13 19:18:35,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279654681] [2019-10-13 19:18:35,036 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:35,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886451023] [2019-10-13 19:18:35,037 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:35,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-13 19:18:35,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380851991] [2019-10-13 19:18:35,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 19:18:35,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:35,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 19:18:35,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:18:35,039 INFO L87 Difference]: Start difference. First operand 452 states and 618 transitions. Second operand 21 states. [2019-10-13 19:18:36,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:36,406 INFO L93 Difference]: Finished difference Result 530 states and 739 transitions. [2019-10-13 19:18:36,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 19:18:36,406 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 215 [2019-10-13 19:18:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:36,410 INFO L225 Difference]: With dead ends: 530 [2019-10-13 19:18:36,410 INFO L226 Difference]: Without dead ends: 527 [2019-10-13 19:18:36,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:18:36,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2019-10-13 19:18:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 458. [2019-10-13 19:18:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2019-10-13 19:18:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 629 transitions. [2019-10-13 19:18:36,509 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 629 transitions. Word has length 215 [2019-10-13 19:18:36,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:36,509 INFO L462 AbstractCegarLoop]: Abstraction has 458 states and 629 transitions. [2019-10-13 19:18:36,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 19:18:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 629 transitions. [2019-10-13 19:18:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-13 19:18:36,513 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:36,513 INFO L380 BasicCegarLoop]: trace histogram [41, 40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:36,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:36,718 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1441747069, now seen corresponding path program 12 times [2019-10-13 19:18:36,719 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:36,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952482480] [2019-10-13 19:18:36,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:36,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:36,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:36,728 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:36,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978288044] [2019-10-13 19:18:36,729 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:37,064 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 19:18:37,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:37,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 76 conjunts are in the unsatisfiable core [2019-10-13 19:18:37,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:37,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3477 backedges. 227 proven. 337 refuted. 0 times theorem prover too weak. 2913 trivial. 0 not checked. [2019-10-13 19:18:37,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952482480] [2019-10-13 19:18:37,365 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:37,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978288044] [2019-10-13 19:18:37,365 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:37,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-13 19:18:37,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586062520] [2019-10-13 19:18:37,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:18:37,366 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:37,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:18:37,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:18:37,366 INFO L87 Difference]: Start difference. First operand 458 states and 629 transitions. Second operand 14 states. [2019-10-13 19:18:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:37,912 INFO L93 Difference]: Finished difference Result 541 states and 754 transitions. [2019-10-13 19:18:37,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:18:37,913 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 237 [2019-10-13 19:18:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:37,916 INFO L225 Difference]: With dead ends: 541 [2019-10-13 19:18:37,916 INFO L226 Difference]: Without dead ends: 538 [2019-10-13 19:18:37,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:18:37,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2019-10-13 19:18:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 452. [2019-10-13 19:18:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2019-10-13 19:18:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 618 transitions. [2019-10-13 19:18:38,008 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 618 transitions. Word has length 237 [2019-10-13 19:18:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:38,008 INFO L462 AbstractCegarLoop]: Abstraction has 452 states and 618 transitions. [2019-10-13 19:18:38,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:18:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 618 transitions. [2019-10-13 19:18:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-13 19:18:38,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:38,012 INFO L380 BasicCegarLoop]: trace histogram [45, 44, 44, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:38,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:38,216 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:38,216 INFO L82 PathProgramCache]: Analyzing trace with hash -49942842, now seen corresponding path program 13 times [2019-10-13 19:18:38,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:38,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971959666] [2019-10-13 19:18:38,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:38,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:38,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:38,223 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:38,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163518185] [2019-10-13 19:18:38,223 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:38,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-13 19:18:38,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:38,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4209 backedges. 88 proven. 337 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2019-10-13 19:18:38,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971959666] [2019-10-13 19:18:38,980 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:38,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163518185] [2019-10-13 19:18:38,980 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:38,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-13 19:18:38,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693569260] [2019-10-13 19:18:38,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:18:38,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:38,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:18:38,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:18:38,981 INFO L87 Difference]: Start difference. First operand 452 states and 618 transitions. Second operand 19 states. [2019-10-13 19:18:41,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:41,148 INFO L93 Difference]: Finished difference Result 614 states and 854 transitions. [2019-10-13 19:18:41,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:18:41,148 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 259 [2019-10-13 19:18:41,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:41,152 INFO L225 Difference]: With dead ends: 614 [2019-10-13 19:18:41,152 INFO L226 Difference]: Without dead ends: 611 [2019-10-13 19:18:41,153 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2019-10-13 19:18:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2019-10-13 19:18:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 600. [2019-10-13 19:18:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-13 19:18:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 839 transitions. [2019-10-13 19:18:41,306 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 839 transitions. Word has length 259 [2019-10-13 19:18:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:41,306 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 839 transitions. [2019-10-13 19:18:41,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:18:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 839 transitions. [2019-10-13 19:18:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-13 19:18:41,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:41,311 INFO L380 BasicCegarLoop]: trace histogram [45, 44, 44, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:41,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:41,515 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:41,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1905159983, now seen corresponding path program 14 times [2019-10-13 19:18:41,516 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:41,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323793320] [2019-10-13 19:18:41,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:41,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:41,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:41,525 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:41,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122322841] [2019-10-13 19:18:41,525 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:41,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:18:41,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:41,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 101 conjunts are in the unsatisfiable core [2019-10-13 19:18:41,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:42,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4217 backedges. 88 proven. 345 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2019-10-13 19:18:42,303 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323793320] [2019-10-13 19:18:42,303 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:42,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122322841] [2019-10-13 19:18:42,304 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:42,304 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-13 19:18:42,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967177244] [2019-10-13 19:18:42,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:18:42,305 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:42,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:18:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:18:42,305 INFO L87 Difference]: Start difference. First operand 600 states and 839 transitions. Second operand 20 states. [2019-10-13 19:18:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:44,317 INFO L93 Difference]: Finished difference Result 763 states and 1076 transitions. [2019-10-13 19:18:44,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 19:18:44,317 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 262 [2019-10-13 19:18:44,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:44,322 INFO L225 Difference]: With dead ends: 763 [2019-10-13 19:18:44,323 INFO L226 Difference]: Without dead ends: 760 [2019-10-13 19:18:44,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 19:18:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2019-10-13 19:18:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 600. [2019-10-13 19:18:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-13 19:18:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 839 transitions. [2019-10-13 19:18:44,454 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 839 transitions. Word has length 262 [2019-10-13 19:18:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:44,455 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 839 transitions. [2019-10-13 19:18:44,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:18:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 839 transitions. [2019-10-13 19:18:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-10-13 19:18:44,459 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:44,459 INFO L380 BasicCegarLoop]: trace histogram [49, 48, 48, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:44,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:44,663 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:44,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1085196165, now seen corresponding path program 15 times [2019-10-13 19:18:44,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:44,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649085169] [2019-10-13 19:18:44,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:44,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:44,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:44,674 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:44,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836231591] [2019-10-13 19:18:44,674 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:44,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 19:18:44,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:44,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-13 19:18:44,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:44,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5011 backedges. 361 proven. 212 refuted. 0 times theorem prover too weak. 4438 trivial. 0 not checked. [2019-10-13 19:18:45,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649085169] [2019-10-13 19:18:45,061 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:45,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836231591] [2019-10-13 19:18:45,061 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:45,061 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-13 19:18:45,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542961279] [2019-10-13 19:18:45,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:18:45,062 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:18:45,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:18:45,062 INFO L87 Difference]: Start difference. First operand 600 states and 839 transitions. Second operand 12 states.